1. Silent design: Designed with quiet technology to maintain the minimum noise level during operation, ensuring that your and work are undisturbed. 2. Dual ventilation: Equipped with double fan blades, providing stronger airflow and allowing you to enjoy fresh and cool air flow easily. 3. Efficient cleaning: This product has an efficient cleaning function and effectively removes small particles and odors from the air, keeping the air fresh and clean. 4. Energy-saving and environmentally friendly: The product adopts energy-saving technology and does not produce any harmful substances during operation, which not only saves energy but also meets environmental requirements. 5. Easy installation: This product is easy to install and remove without using complex tools, saving you time and effort. It is both a fan and a ventilator Exhaust and ventilation Four-speed speed adjustment Delayed shutdown LED display Two-way panel Wiring requirements: The wire should be at least 0.2 square, and the working voltage is 9V-15V It cannot be connected to AC 220V, otherwise it burn out. It has reverse connection protection at low voltage DC 12V. 24V power supply needs to be customized, and the additional step-down module 24V to 12V 1A or more is installed. All indicator lights automatically shut down after 60 seconds of standby, which not be dazzling at night. Note:Installation guide not included, Please check as much as possible to make sure the item is what you need. Tips:The product may be updated constantly,Due To Different Batches, The Actual Product May Have Slight Differences Or Color Differences, Which Does Not Affect Use. Colour:Black Material:Plastic+Metal Package Contents: 1 * Ventilation Cooling Fan Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.